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Dualism (from the Latin word ''duo'' meaning "two")〔The term 'dualism' is recorded in English since 1785–95 (''Random House Webster's Unabridged Dictionary'', 2001, "dualism").〕 denotes the state of two parts. The term 'dualism' was originally coined to denote co-eternal binary opposition, a meaning that is preserved in metaphysical and philosophical duality discourse but has been more generalized in other usages to indicate a system which contains two essential parts. Moral dualism is the belief of the great complement or conflict between the benevolent and the malevolent. It simply implies that there are two moral opposites at work, independent of any interpretation of what might be "moral" and independent of how these may be represented. The moral opposites might, for example, exist in a world view which has one god, more than one god, or none. By contrast, ditheism or bitheism implies (at least) two gods. While bitheism implies harmony, ditheism implies rivalry and opposition, such as between good and evil, or bright and dark, or summer and winter. For example, a ditheistic system would be one in which one god is creative, the other is destructive. Alternatively, in ontological dualism, the world is divided into two overarching categories. The opposition and combination of the universe's two basic principles of yin and yang is a large part of Chinese philosophy, and is an important feature of Taoism, both as a philosophy and as a religion (it is also discussed in Confucianism). In theology, dualism can refer to the relationship between God and creation. The Christian dualism of God and creation exists in some traditions of Christianity, like Paulicianism, Catharism, and Gnosticism. The Paulicians, a Byzantine Christian sect, believed that the universe, created through evil, exists separately from a moral God. The Dvaita Vedanta school of Indian philosophy also espouses a dualism between God and the universe. The first and the more important reality is that of Vishnu or Brahman. Vishnu is the supreme Self, God, the absolute truth of the universe, the independent reality. The second reality is that of dependent but equally real universe that exists with its own separate essence. In Wicca, dualism is represented in the common wiccan belief in a god and a goddess a dual partnership in ruling the universe. In philosophy of mind, dualism is a view about the relationship between mind and matter which claims that mind and matter are two ontologically separate categories. Mind-body dualism claims that neither the mind nor matter can be reduced to each other in any way. Western dualist philosophical traditions (as exemplified by Descartes) equate mind with the conscious self and theorize on consciousness on the basis of mind/body dualism. By contrast, some Eastern philosophies draw a metaphysical line between consciousness and matter — where matter includes both body and mind. In philosophy of science, dualism often refers to the dichotomy between the "subject" (the observer) and the "object" (the observed). Another dualism, in Popperian philosophy of science refers to "hypothesis" and "refutation" (for example, experimental refutation). This notion also carried to Popper's political philosophy. In physics, dualism also refers to media with properties that can be associated with the mechanics of two different phenomena. Because these two phenomena's mechanics are mutually exclusive, both are needed in order to describe the possible behaviors. An example of using two different physical models to describe one phenomenon is wave–particle duality. In cybernetics, Norbert Wiener described "Manicheaen devils" (dualistic adversarial systems) as those systems or problems in which an intelligent adversary is attempting to exploit weaknesses of the investigator (such as in a game-playing opponent, adversarial law, evolutionary systems of predator/parasite and prey/host, politics/enslavement attempts, etc.). Wiener's "Cybernetics" contrasted such systems with "Augustinian devils" that were systems or problems that, though very complex and difficult to figure out, did not feature an adversary with contrary intent. Victories or "expansions of knowledge" in such systems were able to be built upon incrementally, through science (experimentation expanding empirical knowledge bases). Wiener noted that temporary weaknesses (such as errors to perceive all components of a system) were not fatal in attempts to defeat "Augustinian devils" because another experiment could simply be pursued (and he noted that he had personally defeated many "Augustinian devils" with his contributions to science and engineering). Wiener further noted that temporary lapses in judgment against "Manicheaen devils" were more often fatal or destructive, due to the desire of the opponent to "win/survive at all costs," even going so far as to introduce any level of deception into the system (and he noted that he had been defeated by many "Manicheaen devils," such as on occasions when he was temporarily careless in chess). Although this "duality" between "complexity" and "opposition" may seem obvious, there are deep implications in many areas of science, such as game theory, political science, computer science, network science, security science, military science, evolutionary biology, cryptography, etc. ==Moral dualism== Moral dualism is the belief of the great complement or conflict between the benevolent and the malevolent. Like ditheism/bitheism (see below), moral dualism does not imply the absence of monist or monotheistic principles. Moral dualism simply implies that there are two moral opposites at work, independent of any interpretation of what might be "moral" and - unlike ditheism/bitheism - independent of how these may be represented. For example, Mazdaism (Mazdean Zoroastrianism) is both dualistic ''and'' monotheistic (but not monist by definition) since in that philosophy God—the Creator—is purely good, and the antithesis—which is also uncreated—is an absolute one. Zurvanism (Zurvanite Zoroastrianism), Manichaeism and Mandaeism, are representative of dualistic ''and'' monist philosophies since each has a supreme and transcendental First Principle from which the two equal-but-opposite entities then emanate. This is also true for the lesser-known Christian gnostic religions, such as Bogomils, Catharism, and so on. More complex forms of monist dualism also exist, for instance in Hermeticism, where ''Nous'' "thought" - that is described to have created man - brings forth both good and evil, dependent on interpretation, whether it receives prompting from the God or from the Demon. Duality with pluralism is considered a logical fallacy. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Dualism」の詳細全文を読む スポンサード リンク
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